Refrigerating apparatus



I Patentedsept. 1, 1925.

UNITED s'rATEs PATENT OFFICE.

LESTER S. KEILHOLTZ, OF DAYTON, OHIO, ASSIGNOR TO D'ELGO -LIGHT COMPANY 01:

DAYTON, OHIO, A CORPORATION OF DELAWARE.

nnrmmzur NG APPARATUS.

Application filed May 30, 1923. Serial No. 642,370.

To all whom it may concern:

Be it known that I, Lns'rnn S. KEILHOLTZ, a citizen of the United States of America, re-

siding at Dayton, county of Montgomery, 5 State of Ohio, have invented certain new and useful Improvements in Refrigeratin Apparatus, of which the following is a fu clear, and exact description.

This invention relates to. power driving mechanism particularly adapted for pumps and compressors for circulating .fluids, which, owing to their obnoxious character, should not be permitted to escape from the pump or compressor to any appreciable amount.

It is among the aims of the invention to provide for the lubrication of the power driving'mechanism and for the sealing of the compressor or pump from the drivingmechanism more simply and effectively than heretofore.

Other and further objects of the present invention, will be apparent from the following description, reference bemg had to the 5 accompanying drawings, wherein a preferred embodiment of one form of the pres-.

21 and .the partition 22 provides a crank chamber 25 for receiving a portion of the compressor operating mechanism such as eccentrics 26 and 27 and eccentric rods 28 and 29 which are connected with pistons not shown for forcing a fluid, entering by pipe 30, from the chamber 25 intoa chamber 70 supported by the frame 20. The exact nature of the pumping apparatus and of the chamber 70 is immaterial to the present in- 0 Y vention, but, for the sake of illustration, the type of pumping apparatus is one adapted to he used 1n refrigerating apparatus in which refrigerant gas flows into the crank for supportinga shaft 34, attached to eccen tries 26 and 27, and a gear 35. The end frame 23 is provided with a recess 36 for Q 1 a n rece1v1ng-aball bearlng 37, secured 1n pos1- tion by retainer 38 attached by screws 39. End frame 23 is provided with a yoke member 40 projecting into the lubricant chamber 41 provided between the end frame 23 and the partition 22. Yoke 40 provides a bearing 42 for receiving one end of a shaft 43 having an intermediate portion supported by the bearing 37. The shaft 43 provides agear 45 meshing with gear 35, and the portion of shaft 43 overhanging the bearing'37 is connected with a fan 46 and a motor armature 47, which are secured in position by means of a nut 48. After removing nut 48, fan 46, armature 47 may be removed from shaft 43.

A motor field, including a frame 50, pole pieces 51 and coils 52, is secured to the end frame 23 by screws 53. Shell supports brush rigging 54 attached by screws 55 and a cover 56 attached by screws 57. Cover 56 is provided with holes 58 for the entrance into the field frame of air which, by the operation of the fan 46, is expelled from openings 59 in the end frame 23. 3

Obviously rotation of the shaft 43 will produce reciprocation of the eccentric links 28 and 29 to operate the pump or compressor. A,

In order to prevent the escape of fluid in chamber 25 through the aperture provided in partition 22, for shaft 34, a packing recess is provided for receiving packing material 60 compressed by screwing bushing 61 into the partition 22. The lubricant chamber 41 receives a quantity of lubricating oil the normal level of which is indicated by line 62 which is substantially above-the packing material 60 so as to provide an oil seal preventing escape of fluid from'chamber 25 into chamber 41.

During the operation of the driving i mechanism the gear 35 will splash oil from chamber 41 adjacent interior walls of the frame 20. Some of this oil will be received by pocket 63 provided in the yoke 40 and will flow through the openin 64 into con tact with shaft 43 in order to lubricate said shaft and bearing 42. Some oil will flow alon the shaft- 43 and frame 23 into the bearing 37. T heexcess of oils will be received by a pocket 65 provided by the bearing retaining member 38. From pocket 65 oil is conducted through a duct- 66 back to the oil reservoir 41. A duct 67 provides for the passage-of oil into the bearing 33.

' The bearing 32 is lubricated by oil which simple manner.

leaks past the bushing 61 and the packing 60. a

It is apparent from the foregoing that there is but one receptacle in which to place oil for lubricating the driving mechanism and for sealing the driving mechanism from the pump or compressor. The bearings for the motor shaft 43 ."IB located so as to be supplied with oil in chamber 41 splashed during the rotation of gear 35. Th1s same oil provides lubrication for' the shaft 34 and also assists to prevent t! e escape of fluid from the pump or compressor.v

The apparatus may be disassembled in a After removing screws 24 the drivin mechanism including the motor motor shaft, shaft 43 and e1 frame 23-can be removed as a unit. Thereafter the shaft 34 can be removed endwise from the eccentries 26 and 27 and bearings 31 and 32. After removing screws 53 in field frame 50 the parts supported thereby can be removed as a unit. After removing nut 48 the armature and fan 46 can be removed. For details of construction of armature 47 and the mounting thereof on the armature shaft reference is made to copending application of George A. Buvinger and Clarence Warner. Serial No. 516,159, filed November 18, 1921. After removal of screws 39 the shaft carrying the bearing 37 can be removed from the end frame 23.

While the form of mechanism herein shown and described constitutes a preferred embodiment of one form of invention. it is to be understood that other forms might be adopted and various changes and alterations made in the shape, size and proportion of the elements therein wlthout eparting from the spirit and scope of the invention. 1

What is claimedis as follows:

Power operated pump apparatus comprising a hollow frame or housing having a partition which-divides the interior thereof into a crank chamber for a pump'and a lubricant chamber within which gearing for drivin the pump is located, and one end of which lubricant chamber is open; a removable end wall for closing the open end of said lubricant chamber; an electric motor carried by said end Wall and the armature shaft of Which is supported in a bearing carried by said wall; a yoke carried by said end Wall and extending into said lubricant chamber, and having a second bearing for the end of said armature shaft; a pump driving shaft extending from said pump chamber through a bearin carried by said partition and into said lubrlcant chamber, and the end of which shaft is supported in a bearing carried by said end wallfa gear carried by said pump shaft and located 75 within said lubricant chamber; and a pinion carried by said armature shaft and located between the two bearings aforesaid provided for said shaft, and which pinion meshes with said gear.

In testimony whereof I hereto atlix my signature.

LESTER s. KEILHOLTZ. 

